How does snow accumulation on boiler tubes affect thermal efficiency?

Snow accumulation on boiler tubes can significantly impact the thermal efficiency of the system. When snow or any form of insulation or buildup accumulates on the surface of the boiler tubes, it creates a barrier between the heat source (such as the combustion gases) and the water or fluid being heated. This additional layer of material acts to insulate the boiler tubes, which means that less heat is transferred to the water or steam inside the boiler.

As a result, the boiler must work harder to produce the same amount of steam or hot water, leading to an increase in fuel consumption. This inefficiency is detrimental because it not only wastes energy but also can lead to higher operational costs. Consequently, the ability to transfer heat effectively is compromised, thus resulting in decreased thermal efficiency.

Overall, the accumulation of snow on boiler tubes impedes the efficient transfer of heat, thereby reducing the thermal efficiency of the system.